Constraining new coloured matter from the ratio of 3- to 2-jets cross sections at the LHC

Diego Becciolini, Marc Gillioz, Marco Nardecchia +2

The Large Hadron Collider experiments are probing the evolution of the strong coupling ${\alpha }_s$ up to the TeV scale. We show how the ratio of 3- to 2-jets cross sections is affected b…